JP7343956B2 - Terminals, wireless communication methods and systems - Google Patents

Description

The present invention relates to a user terminal and a wireless communication method in a next generation mobile communication system.

In UMTS (Universal Mobile Telecommunications System) networks, Long Term Evolution (LTE) has been specified for the purpose of higher data rates, lower delays, etc. (Non-Patent Document 1). In addition, with the aim of further increasing the bandwidth and speed from LTE, we are developing successor systems to LTE (for example, LTE-A (LTE-Advanced), FRA (Future Radio Access), 4G, 5G, 5G+ (plus), NR ( New RAT), LTE Rel.14, 15 or later) are also being considered.

In existing LTE systems (for example, LTE Rel. 8-13), 1 ms subframes (also referred to as transmission time intervals (TTI), etc.) are used for downlink (DL) and/or uplink transmission. Link (UL: Uplink) communication is performed. The subframe is a transmission time unit of one channel-coded data packet, and is a processing unit for scheduling, link adaptation, retransmission control (HARQ: Hybrid Automatic Repeat reQuest), and the like.

Furthermore, in existing LTE systems (for example, LTE Rel. 8-13), user terminals use an uplink control channel (for example, PUCCH: Physical Uplink Control Channel) or an uplink data channel (for example, PUSCH: Physical Uplink Shared Channel). is used to transmit uplink control information (UCI). The configuration (format) of the uplink control channel is called PUCCH format (PF) or the like.

Furthermore, in the existing LTE system, a user terminal multiplexes and transmits a UL channel and a DMRS (Demodulation Reference Signal) within a TTI of 1 ms. Within a 1 ms TTI, multiple DMRSs of different layers of the same user terminal (or different user terminals) use cyclic shift (CS) and/or orthogonal spreading codes (e.g., orthogonal cover code (OCC)). )) is orthogonally multiplexed.

3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

In future wireless communication systems (for example, LTE Rel.15 or later, 5G, 5G+, NR, etc.), when transmitting UCI using an uplink control channel (for example, PUCCH), upper layer signaling and downlink control information (DCI) It is being considered to determine resources for the uplink control channel (for example, PUCCH resources) based on predetermined field values in the uplink control channel. Furthermore, it is being considered that the PUCCH resource includes multiple parameters.

If the user terminal does not appropriately interpret the plurality of parameters included in the determined PUCCH resource, there is a possibility that the PUCCH cannot be properly transmitted.

The present invention has been made in view of this point, and one of its objects is to provide a terminal, a wireless communication method , and a system that appropriately transmit uplink control channels.

A terminal according to one aspect of the present invention includes frequency hopping information indicating whether frequency hopping of a physical uplink control channel (PUCCH) is enabled, and a starting PRB that is the first physical resource block (PRB) in the first hop. and a second hop PRB that is the first PRB in the second hop; a control unit that applies at least one of a code configuration and a reference sequence to the PUCCH, and when the frequency hopping information indicates invalidity, the control unit applies a first spreading code for non-frequency hopping. If a time domain orthogonal cover code with a second spreading rate is applied to the PUCCH and the frequency hopping information indicates validity, a time domain orthogonal cover code with a second spreading rate for frequency hopping is applied to the PUCCH, and the frequency hopping information is In the case of indicating validity, even if the positions of the second hop PRB and the start PRB in the frequency direction are the same, different reference sequences are set for the PUCCH between the first hop and the second hop. It is characterized by being used as

According to the present invention, uplink control channels can be appropriately transmitted in future wireless communication systems.

FIG. 3 is a diagram illustrating an example of PUCCH resource allocation. It is a figure which shows an example of association of PUCCH length and SF. FIG. 3 is a diagram illustrating an example of association between SF and time domain OCC. FIGS. 4A and 4B are diagrams illustrating an example of an SF determining method according to the first aspect. 5A and 5B are diagrams illustrating an example of a method for determining a DMRS configuration according to the second aspect. 6A and 6B are diagrams illustrating an example of a reference sequence and SF determination method according to aspect 3-1. FIGS. 7A and 7B are diagrams illustrating an example of a reference sequence and SF determining method according to aspect 3-2. FIGS. 8A and 8B are diagrams illustrating an example of an SF determining method according to the fourth aspect. 9A and 9B are diagrams illustrating an example of an SF determining method according to the fifth aspect. 10A and 10B are diagrams illustrating an example of a method for determining a DMRS configuration according to the sixth aspect. FIGS. 11A and 11B are diagrams illustrating an example of a method for determining a reference sequence and SF according to aspect 7-1. FIGS. 12A and 12B are diagrams illustrating an example of a reference sequence and SF determining method according to aspect 7-2. FIGS. 13A and 13B are diagrams illustrating an example of an SF determining method according to the eighth aspect. FIGS. 14A and 14B are diagrams illustrating an example of a method for determining a DMRS configuration according to the ninth aspect. FIGS. 15A and 15B are diagrams illustrating an example of a reference sequence and SF determining method according to aspect 10-1. 16A and 16B are diagrams illustrating an example of a reference sequence and SF determining method according to aspect 10-2. 1 is a diagram showing an example of a schematic configuration of a wireless communication system according to the present embodiment. FIG. 1 is a diagram showing an example of the overall configuration of a wireless base station according to the present embodiment. 1 is a diagram illustrating an example of a functional configuration of a wireless base station according to the present embodiment. FIG. 1 is a diagram showing an example of the overall configuration of a user terminal according to the present embodiment. FIG. 2 is a diagram illustrating an example of a functional configuration of a user terminal according to the present embodiment. FIG. 2 is a diagram showing an example of the hardware configuration of a wireless base station and a user terminal according to the present embodiment.

In future wireless communication systems (for example, LTE Rel. 15 or later, 5G, NR, etc.), the configuration (format, also referred to as PUCCH format (PF), etc.) for uplink control channels (for example, PUCCH) used for UCI transmission will be is being considered. For example, LTE Rel. 15, support for five types of PF0 to PF4 is being considered. Note that the names of the PFs shown below are merely examples, and different names may be used.

For example, PF0 and 1 are PFs used to transmit up to 2 bits UCI (for example, delivery confirmation information (HARQ-ACK: Hybrid Automatic Repeat reQuest-Acknowledge, also referred to as ACK or NACK, etc.). PF0 can be allocated to 1 or 2 symbols, so it is also called short PUCCH or sequence-based short PUCCH.On the other hand, PF1 can be allocated to 4-14 symbols, so it is called long PUCCH. In PF1, block spreading in the time domain using at least one of cyclic shift (CS) and orthogonal sequences (e.g., Orthogonal Cover Code (OCC), time domain OCC (time domain OCC)) is performed. A plurality of user terminals may be code division multiplexed (CDM) within the same resource block (physical resource block (PRB)) by block-wise spreading.

PF2-4 is configured to transmit UCI with more than 2 bits (for example, Channel State Information (CSI) (or CSI and HARQ-ACK and/or Scheduling Request (SR)). This is the PF used. Since PF2 can be allocated to 1 or 2 symbols, it is also called short PUCCH or the like. On the other hand, PFs 3 and 4 are also called long PUCCHs because they can be allocated to 4 to 14 symbols. In PF4, the UCI of multiple user terminals may be CDMed using pre-DFT (frequency domain) block spreading using orthogonal sequences (eg, OCC, pre-DFT OCC, frequency domain OCC). In PF4, the UCI of a plurality of user terminals may be CDMed using (frequency domain) block spreading before DFT using a demodulation reference signal (DMRS).

Allocation of resources (for example, PUCCH resources) used for transmission of the uplink control channel is performed using upper layer signaling and/or downlink control information (DCI). Here, the upper layer signaling is, for example, at least one of RRC (Radio Resource Control) signaling, system information (for example, RMSI: Remaining Minimum System Information, OSI: Other system information, MIB: Master Information Block, SIB: System Information Block). (2), broadcast information (PBCH: Physical Broadcast Channel).

Specifically, one or more sets (PUCCH resource sets) each including one or more PUCCH resources are notified (configured) to the user terminal by upper layer signaling. For example, the radio base station may notify the user terminal of K (for example, 1≦K≦4) PUCCH resource sets. Each PUCCH resource set may include M (eg, 4≦M≦8) PUCCH resources.

The user terminal may determine a single PUCCH resource set from the configured K PUCCH resource sets based on the UCI payload size (UCI payload size). The UCI payload size may be the number of UCI bits excluding cyclic redundancy check (CRC) bits.

The user terminal extracts the DCI and implicit information (implicit indication information, implicit index, implicit index, etc.) from the M PUCCH resources included in the determined PUCCH resource set. PUCCH resources used for UCI transmission may be determined based on at least one of the following.

FIG. 1 is a diagram illustrating an example of PUCCH resource allocation. In FIG. 1, as an example, it is assumed that K=4 and four PUCCH resource sets #0 to #3 are configured from the radio base station to the user terminal by upper layer signaling. Further, it is assumed that PUCCH resource sets #0-#3 each include M (for example, 4≦M≦8) PUCCH resources #0-#M-1. Note that the number of PUCCH resources included in each PUCCH resource set may be the same or different.

In FIG. 1, each PUCCH resource configured in a user terminal may include the value of at least one parameter (also referred to as a field or information, etc.) below. Note that each parameter may have a range of possible values for each PUCCH format.
・Symbol where PUCCH allocation starts (start symbol, first symbol)
・Number of symbols allocated to PUCCH within a slot (period allocated to PUCCH)
- Index of the resource block (starting PRB, first (lowest) PRB) where PUCCH allocation is started (e.g. PUCCH-starting-PRB)
- Number of PRBs allocated to PUCCH (for example, for PF2 or 3)
-Whether frequency hopping for the PUCCH resource is enabled or disabled (e.g. PUCCH-frequency-hopping)
- Frequency resources after frequency hopping (second hop) (e.g., starting PRB or index of the first (lowest) PRB in the second hop, PUCCH-2nd-hop-PRB)
- Initial cyclic shift (CS) index (e.g. for PF0 or 1)
・Index of orthogonal sequence (e.g., time-domain OCC) in time-domain (e.g., for PF1)
- Length of orthogonal sequence (e.g. Pre-DFT OCC) used for block-wise spreading before discrete Fourier transform (DFT) (also referred to as Pre-DFT OCC length, spreading factor, etc.) (e.g. PF4 for)
・Index of orthogonal sequence (e.g. Pre-DFT OCC) used for block spreading before DFT (e.g. for PF4)

As shown in FIG. 1, when PUCCH resource sets #0 to #3 are configured for a user terminal, the user terminal selects one of the PUCCH resource sets based on the UCI payload size.

For example, if the UCI payload size is 1 or 2 bits, PUCCH resource set #0 is selected. Further, if the UCI payload size is 3 bits or more and N ₂ -1 bits or less, PUCCH resource set #1 is selected. Furthermore, if the UCI payload size is greater than or equal to N ₂ bits and less than or equal to N ₃ -1 bits, PUCCH resource set #2 is selected. Similarly, if the UCI payload size is greater than or equal to N ₃ bits and less than or equal to N ₃ -1 bits, PUCCH resource set #3 is selected.

In this way, the range of UCI payload size from which PUCCH resource set #i (i=0,...,K-1) is selected is from N _i bits to N _i+1 -1 bits (i.e., {N _i ,..., N _i+1 −1} bits).

Here, the starting positions (starting bit numbers) N ₀ and N ₁ of the UCI payload size for PUCCH resource sets #0 and #1 may be 1 and 3, respectively. As a result, PUCCH resource set #0 is selected when transmitting UCI of 2 bits or less, so PUCCH resource set #0 uses PUCCH resources #0 to #M-1 for at least one of PF0 and PF1. May include. On the other hand, when transmitting a UCI exceeding 2 bits, one of PUCCH resource sets #1 to #3 is selected. It may also include PUCCH resources #0 to #M-1 for one use.

When i=2,...,K-1, information indicating the start position (N _i ) of the UCI payload size for PUCCH resource set #i (start position information) is sent to the user terminal using upper layer signaling. It may be notified (set). The starting position (N _i ) may be user terminal specific. For example, the starting position (N _i ) may be set to a value in a range of 4 bits or more and 256 or less (for example, a multiple of 4). For example, in FIG. 1, the information indicating the starting position (N ₂ , N 3 ) of the UCI payload size for PUCCH resource sets #2 and # ₃ is transmitted by upper layer signaling (e.g., user-specific RRC signaling) to the user. Notification will be sent to the device.

The maximum payload size of the UCI of each PUCCH resource set is given by N _K −1. _NK may be explicitly notified (set) to the user terminal by upper layer signaling and/or DCI, or may be implicitly derived. For example, in FIG. 1, N ₀ =1 and N ₁ =3 are defined in the specifications, and N ₂ and N ₃ may be notified by upper layer signaling. Further, N ₄ may be specified in the specifications (for example, N ₄ =1000).

In the case shown in FIG. 1, the user terminal selects the value of a predetermined field of DCI and/or other Based on the parameters, a single PUCCH resource can be determined to be used for transmitting the UCI. For example, if the number of bits in the predetermined field is 2 bits, four types of PUCCH resources can be specified. Other parameters may be CCE index. For example, PUCCH resources may be associated with a combination of 2-bit DCI and other parameters, or may be associated with 3-bit DCI.

For example, when the UCI is HARQ-ACK, the user equipment (UE) determines one PUCCH resource set based on the UCI payload size from multiple PUCCH resource sets configured by the upper layer, and selects one PUCCH resource set from the determined PUCCH resource set. One PUCCH resource may be determined based on DCI and/or other parameters. The PUCCH resource notification method using the PUCCH resource set described above may also be used when the UCI encodes HARQ-ACK and other UCI (for example, CSI and/or SR) and transmits them simultaneously.

On the other hand, if the UCI does not include HARQ-ACK, PUCCH resources may be notified without using the PUCCH resource set. For example, if the UCI is CSI and/or SR, the UE may use PUCCH resources semi-statically configured by an upper layer.

In addition, the UE sets the number of slots for PUCCH transmission (PUCCH slot number, PUCCH repetition number) N _PUCCH ^repeat to upper layer parameters (for example, PUCCH-F1-number-of-slots for PF1, PUCCH-F1-number-of-slots for PF3, -F3-number-of-slots, or PUCCH-F4-number-of-slots for PF4). If N _PUCCH ^repeat is greater than 1, the UE transmits the PUCCH over multiple slots (N _PUCCH ^repeat slots).

The UE repeats the UCI in the PUCCH transmission in the first slot of N _repeat slots in each PUCCH transmission of the remaining N _repeat -1 slots.

Further, in PF1, the number of user terminals to be multiplexed by time domain OCC is determined according to the PUCCH period (Long-PUCCH duration, number of symbols). The maximum number of user terminals multiplexed by time domain OCC can also be expressed as OCC multiplexing capacity, OCC length, spreading factor (SF), or the like.

When multiplexing UEs is performed using cyclic shift (CS) in addition to time domain OCC, the maximum value of multiplexing capacity in a given resource is the maximum value of OCC multiplexing capacity x the number of CSs. The number of CSs may be a predetermined value (for example, 12).

When applying time-domain OCC to PUCCH (for example, PF1), from the viewpoint of maintaining orthogonality, the base sequence is the same within the period multiplied by one time-domain OCC (the same base sequence is applied). There is a need to. Note that different values may be applied to the cyclic shift applied to the reference sequence within the period multiplied by one time domain OCC.

As shown in FIG. 2, the SF of time domain OCC for PUCCH format 1 may be associated with the PUCCH length (number of PUCCH symbols). An SF for no intra-slot hopping and an SF for intra-slot hopping may be associated with the PUCCH length. When there is one intra-slot hopping, the SF with intra-slot hopping is the SF for the first hop (1st hop, before frequency hopping, hopping index m = 0), and the SF for the second hop (2nd hop, after frequency hopping, SF for hopping index m=1). In this way, a table indicating the SF for each value of the PUCCH length may be defined in the specifications.

As shown in FIG. 3, the same number of time domain OCCs as SFs may be associated with an SF. Here, the time-domain OCC is represented by exp(j2πφ/SF), and FIG. 3 shows φ that determines the time-domain OCC. In this way, a table indicating at least one time-domain OCC for each value of SF may be specified in the specification.

The association between the PUCCH length and the SF, and the association between the SF and the time domain OCC may be set in advance or may be defined in the specifications.

According to the parameters included in the PUCCH resource, higher layer parameters (for example, PUCCH-frequency-hopping) indicate whether frequency hopping of the PUCCH resource is enabled or disabled. may be done. The index of the first PRB (lowest PRB) before frequency hopping or without frequency hopping may be indicated by an upper layer parameter (eg, PUCCH-starting-PRB). The index of the first PRB (lowest PRB) after frequency hopping may be indicated by (eg, PUCCH-2nd-hop-PRB).

However, the details of UE operation for setting up frequency hopping have not yet been determined. For example, it is not clear how the UE operates based on parameters related to frequency hopping such as PUCCH-frequency-hopping. Therefore, the inventors of the present invention studied the UE operation with respect to the setting of PUCCH frequency hopping, and arrived at the present invention.

This embodiment will be described in detail below. The embodiments described below may be applied alone or in combination.

(First aspect)
In a first aspect, the UE is configured with PUCCH-starting-PRB, PUCCH-2nd-hop-PRB, and PUCCH-frequency-hopping (or three parameters equivalent thereto), and PUCCH-starting-PRB and PUCCH A method in which the UE determines the SF for PUCCH format 1 when the -2nd-hop-PRBs are equal will be described.

The SF for PUCCH format 1 is associated with the PUCCH length, the SF for no intra-slot hopping and the SF for with intra-slot hopping are associated with the PUCCH length, and the SF for with intra-slot hopping is for the first hop. Assume that it includes an SF and a second hop SF (for example, FIG. 2). Further, it is assumed that a time domain OCC sequence is associated with the SF (for example, FIG. 3).

Note that the UE may use the SF with intra-slot hopping even if it does not actually perform intra-slot frequency hopping of the PUCCH.

The UE may determine the SF based on PUCCH-starting-PRB, PUCCH-2nd-hop-PRB, and PUCCH-frequency-hopping among the configured PUCCH resources.

If PUCCH-starting-PRB is equal to PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is disabled, the UE may apply SF for no intra-slot hopping, as shown in Figure 4A. .

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (OCC multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

If PUCCH-starting-PRB is equal to PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is enabled, the UE may apply SF for with intra-slot hopping, as shown in Figure 4B. . In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing. Here, the above frequency hopping timing may be the same as the frequency hopping timing when PUCCH-starting-PRB is different from PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is valid. For example, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ceil (PUCCH number of symbols/2).

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

According to the first aspect, the NW (network, e.g., wireless base station, gNB) can flexibly change the SF (OCC length or OCC multiplexing capacity) using frequency hopping settings.

(Second aspect)
In a second aspect, the UE is configured with PUCCH-starting-PRB, PUCCH-2nd-hop-PRB, and PUCCH-frequency-hopping (or three parameters equivalent thereto), and PUCCH-starting-PRB and PUCCH A method for the UE to determine the DMRS configuration for PUCCH formats 3 and/or 4 when the -2nd-hop-PRBs are equal to each other will be described. The DMRS configuration may be a DMRS location (eg, symbol).

Similar to SF, regarding the DMRS configuration for PUCCH formats 3 and/or 4, a DMRS configuration for no intra-slot hopping and a DMRS configuration for intra-slot hopping are provided. The configuration may be defined in the specification. The DMRS configuration with intra-slot hopping may include a first hop DMRS configuration and a second hop DMRS configuration.

The UE may determine the DMRS configuration based on PUCCH-starting-PRB, PUCCH-2nd-hop-PRB, and PUCCH-frequency-hopping among the configured PUCCH resources.

If PUCCH-starting-PRB is equal to PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is disabled, the UE applies the DMRS configuration for no intra-slot hopping, as shown in Figure 5A. Good too.

If PUCCH-starting-PRB is equal to PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is enabled, the UE applies the DMRS configuration for with intra-slot hopping, as shown in Figure 5B. Good too. In this case, the UE may apply the first hop DMRS configuration before the frequency hopping timing, and may apply the second hop DMRS configuration after the frequency hopping timing. Here, the above frequency hopping timing may be the same as the frequency hopping timing when PUCCH-starting-PRB is different from PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is valid. For example, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ceil (PUCCH number of symbols/2).

Note that the location of the DMRS when frequency hopping is not applied may be the same as the location of the DMRS when frequency hopping is applied.

According to the second aspect, the NW can flexibly change the DMRS configuration using frequency hopping settings.

(Third aspect)
In a third aspect, the UE is configured with PUCCH-starting-PRB, PUCCH-2nd-hop-PRB, and PUCCH-frequency-hopping (or three parameters equivalent thereto), and PUCCH-starting-PRB and PUCCH - If the 2nd-hop-PRBs are equal to each other, the UE specifies a reference sequence for at least one of PUCCH formats 0 to 4 (in particular, PUCCH formats 0, 1, 3, 4) and/or for PUCCH format 1. A method for determining the SF of is explained. A reference sequence may be represented by a reference sequence index.

The reference series may be a CAZAC (Constant Amplitude Zero Auto-Correlation) series such as a Zadoff-Chu series (for example, a low PAPR (peak-to-average power ratio) series), or a specification It may be a sequence defined by (for example, a low PAPR sequence) or a pseudo-spreading sequence (for example, a Gold sequence). For example, PUCCH with a bandwidth of 1 PRB is based on one of a predetermined number of sequences (for example, 30, 60, or a predetermined value determined from the reference sequence length) specified by the specifications. It may also be used as a series. The reference sequence may be used for UCI or DMRS.

Similar to the first aspect, regarding the SF for PUCCH format 1, an SF for no intra-slot hopping and an SF for with intra-slot hopping may be set in advance or defined in the specifications.

The UE may determine the reference sequence and/or SF based on PUCCH-starting-PRB, PUCCH-2nd-hop-PRB, and PUCCH-frequency-hopping among the configured PUCCH resources.

For reference sequence hopping, there are two methods: hopping the reference sequence in units of slots (slot level) and hopping the reference sequence at the timing of frequency hopping (in units of OCC length) (frequency hop level, time domain OCC level). Conceivable.

(Aspect 3-1)
Aspect 3-1 describes a case where slot-level reference sequence hopping is applied.

If PUCCH-starting-PRB is equal to PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is disabled, the UE may apply SF for no intra-slot hopping, as shown in Figure 6A. .

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

Furthermore, the UE uses one reference sequence #m ₀ within one slot, regardless of whether PUCCH-frequency-hopping is enabled or disabled. In other words, the reference sequence does not change before and after the frequency hopping timing.

If PUCCH-starting-PRB is equal to PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is enabled, the UE may apply SF for with intra-slot hopping, as shown in Figure 6B. . In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing. Here, the above frequency hopping timing may be the same as the frequency hopping timing when PUCCH-starting-PRB is different from PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is valid. For example, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ceil (PUCCH number of symbols/2).

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

According to aspect 3-1, the NW can flexibly change the SF (OCC length) depending on whether PUCCH-frequency-hopping is enabled or disabled.

(Aspect 3-2)
In aspect 3-2, a case will be described in which frequency hop level reference sequence hopping is applied.

Note that even if the UE does not actually perform PUCCH frequency hopping, it may perform reference sequence hopping at the frequency hopping timing.

If PUCCH-starting-PRB is equal to PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is disabled, the UE may apply SF for no intra-slot hopping, as shown in Figure 7A. .

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

Further, when PUCCH-frequency-hopping is disabled, the UE does not perform frequency hopping, and therefore does not perform reference sequence hopping at the frequency hop level. Therefore, the UE uses one reference sequence #m ₀ within one slot.

If PUCCH-starting-PRB is equal to PUCCH-2nd-hop-PRB and PUCCH-frequency-hopping is enabled, the UE may apply SF for with intra-slot hopping, as shown in Figure 7B. . In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing.

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

Further, when PUCCH-frequency-hopping is enabled, the UE performs reference sequence hopping (switches the reference sequence) at the timing of frequency hopping for at least one of PUCCH formats 0 to 4. In this case, the UE may apply the reference sequence #m ₀ before the frequency hopping timing and apply the reference sequence #m ₁ after the frequency hopping timing.

By varying the reference sequences within a slot, the probability that multiple UEs use different reference sequences increases, for example, before and/or after frequency hopping (reference sequence hopping). Therefore, the collision probability of the reference sequence is lowered, and the resistance to inter-cell interference is increased.

According to the third aspect, the NW can flexibly change the SF using frequency hopping settings. Furthermore, the UE can appropriately control reference sequence hopping based on the frequency hopping settings.

Also, since it is preferable to use the same reference sequence within one time domain OCC, reference sequence hopping at the slot level or frequency hop level is applied. On the other hand, since changing the cyclic shift within one time domain OCC does not affect the orthogonality of the time domain OCC, hopping in units of symbols (symbol level) may be applied to the cyclic shift. , slot level hopping or frequency hop level cyclic shift hopping may be applied in the same way as the reference sequence.

(Fourth aspect)
In a fourth aspect, a method of reducing upper layer parameters related to frequency hopping for at least one of PUCCH formats 0 to 4 will be described.

The UE may determine whether PUCCH frequency hopping is effective based on PUCCH-starting-PRB and PUCCH-2nd-hop-PRB among the configured PUCCH resources. In other words, PUCCH-frequency-hopping does not need to be notified to the UE.

If the UE is configured with PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are equal to each other, the UE may assume that PUCCH-frequency-hopping is disabled, as shown in FIG. 8A.

For example, the UE uses at least one of the first aspect, the second aspect, and the third aspect to determine at least one of SF, DMRS configuration, and reference sequence when PUCCH-frequency-hopping is disabled. may be determined.

If the UE is configured with different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB, the UE may assume that PUCCH-frequency-hopping is enabled, as shown in FIG. 8B.

For example, the UE uses at least one of the first aspect, the second aspect, and the third aspect to determine at least one of SF, DMRS configuration, and reference sequence when PUCCH-frequency-hopping is enabled. may be determined.

According to the fourth aspect, the NW reduces the upper layer parameters by not notifying the UE of the upper layer parameters (e.g., PUCCH-frequency-hopping) indicating whether PUCCH frequency hopping is enabled or disabled. This simplifies UE operation.

(Fifth aspect)
In a fifth aspect, when the UE is configured with at least PUCCH-starting-PRB and PUCCH-2nd-hop-PRB (or two parameters equivalent thereto), PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are configured. A method of determining SF (OCC length) for PUCCH format 1 based on hop-PRB will be described.

If the UE configures PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are equal to each other, as shown in Figure 9A, the UE will First, the UE may apply SF for no intra-slot hopping.

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

When the UE is configured with different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB, the UE may apply the SF with intra-slot hopping, as shown in FIG. 9B. In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing. Here, regarding the above frequency hopping timing, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ) may be ceil (number of PUCCH symbols/2).

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

The UE can obtain frequency diversity gain by performing PUCCH frequency hopping within the slot.

When the UE is configured with PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other, it may be assumed that PUCCH-frequency-hopping is not disabled (enabled). In addition, if PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other are set, the UE uses SF for with intra-slot hopping regardless of whether PUCCH-frequency-hopping is enabled or disabled. may be applied.

When PUCCH-frequency-hopping is set to disabled and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set to be equal to each other, the UE applies SF for no intra-slot hopping, and the UE -If frequency-hopping is enabled and different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set, the UE may perform the operation of applying SF with intra-slot hopping. . If PUCCH-frequency-hopping is set to invalid and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other are set for the UE that performs the UE operation, even if the setting is assumed to be invalid. Yes (you may assume that combination is not set). If PUCCH-frequency-hopping is set to valid and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set to be equal to each other, the UE that performs the UE operation may assume that the setting is invalid. Yes (you may assume that combination is not set).

According to the fifth aspect, the NW can flexibly change the SF using frequency hopping settings.

The NW does not need to notify the UE of an upper layer parameter (for example, PUCCH-frequency-hopping) indicating whether PUCCH frequency hopping is enabled or disabled. In this case, upper layer parameters can be reduced and UE operation can be simplified.

(Sixth aspect)
In a sixth aspect, when the UE is configured with at least PUCCH-starting-PRB and PUCCH-2nd-hop-PRB (or two parameters equivalent thereto), PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are configured. A method for determining the DMRS configuration for PUCCH format 3 and/or 4 based on hop-PRB will be described.

Similar to SF, regarding the DMRS configuration for PUCCH formats 3 and/or 4, a DMRS configuration for no intra-slot hopping and a DMRS configuration for intra-slot hopping are provided. The configuration may be defined in the specification. The DMRS configuration with intra-slot hopping may include a first hop DMRS configuration and a second hop DMRS configuration.

The UE may determine the DMRS configuration based on the PUCCH-starting-PRB and PUCCH-2nd-hop-PRB among the configured PUCCH resources.

If the UE configures PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are equal to each other, as shown in Figure 10A, the UE will First, the UE may apply a DMRS configuration for no intra-slot hopping.

If the UE is configured with different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB, the UE may apply a DMRS configuration with intra-slot hopping, as shown in FIG. 10B. In this case, the UE may apply the first hop DMRS configuration before the frequency hopping timing, and may apply the second hop DMRS configuration after the frequency hopping timing. Here, regarding the above frequency hopping timing, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ) may be ceil (number of PUCCH symbols/2).

When the UE is configured with PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other, it may be assumed that PUCCH-frequency-hopping is not disabled (enabled). In addition, when PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other are set, the UE is configured to A DMRS configuration may also be applied.

If PUCCH-frequency-hopping is set to disabled and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set to be equal to each other, the UE applies the DMRS configuration for no intra-slot hopping, and the UE: When PUCCH-frequency-hopping is enabled and different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set, the UE performs the operation of applying the DMRS configuration with intra-slot hopping. Good too. If PUCCH-frequency-hopping is set to invalid and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other are set for the UE that performs the UE operation, even if the setting is assumed to be invalid. Yes (you may assume that combination is not set). If PUCCH-frequency-hopping is set to valid and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set to be equal to each other, the UE that performs the UE operation may assume that the setting is invalid. Yes (you may assume that combination is not set).

Note that the location of the DMRS when frequency hopping is not applied may be the same as the location of the DMRS when frequency hopping is applied.

According to the sixth aspect, the NW can flexibly change the DMRS configuration using frequency hopping settings.

The NW does not need to notify the UE of an upper layer parameter (for example, PUCCH-frequency-hopping) indicating whether PUCCH frequency hopping is enabled or disabled. In this case, upper layer parameters can be reduced and UE operation can be simplified.

(Seventh aspect)
In a seventh aspect, when the UE is configured with at least PUCCH-starting-PRB and PUCCH-2nd-hop-PRB (or two parameters equivalent thereto), PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are configured. Describes a method for determining a reference sequence for at least one of PUCCH formats 0 to 4 (particularly PUCCH formats 0, 1, 3, 4) and/or an SF for PUCCH format 1 based on a hop-PRB do.

The UE may determine the reference sequence and/or SF based on the PUCCH-starting-PRB and PUCCH-2nd-hop-PRB among the configured PUCCH resources.

(Aspect 7-1)
Aspect 7-1 describes a case where slot-level reference sequence hopping is applied.

If the UE configures PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are equal to each other, the UE will set PUCCH-frequency-hopping regardless of whether PUCCH-frequency-hopping is enabled or disabled, as shown in Figure 11A. First, the UE may apply SF for no intra-slot hopping.

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

If the UE is configured with different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB, the UE may apply the SF with intra-slot hopping, as shown in FIG. 11B. In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing. Here, regarding the above frequency hopping timing, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ) may be ceil (number of PUCCH symbols/2).

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

The UE uses one reference sequence #m ₀ within one slot, regardless of whether PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are equal or not. In other words, the reference sequence does not change before and after the frequency hopping timing.

When the UE is configured with PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other, it may be assumed that PUCCH-frequency-hopping is not disabled (enabled). In addition, if PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other are set, the UE uses SF for with intra-slot hopping regardless of whether PUCCH-frequency-hopping is enabled or disabled. may be applied.

When PUCCH-frequency-hopping is set to disabled and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set to be equal to each other, the UE applies SF for no intra-slot hopping, and the UE -If frequency-hopping is enabled and different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set, the UE may perform the operation of applying SF with intra-slot hopping. . If PUCCH-frequency-hopping is set to invalid and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other are set for the UE that performs the UE operation, even if the setting is assumed to be invalid. Yes (you may assume that combination is not set). If PUCCH-frequency-hopping is set to valid and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set to be equal to each other, the UE that performs the UE operation may assume that the setting is invalid. Yes (you may assume that combination is not set).

According to aspect 7-1, the NW can flexibly change the SF (OCC length) depending on whether PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are equal.

(Aspect 7-2)
Aspect 7-2 describes a case where frequency hop level reference sequence hopping is applied.

If the UE configures PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are equal to each other, as shown in Figure 12A, the UE will First, the UE may apply SF for no intra-slot hopping.

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

Furthermore, when the UE is configured with the same PUCCH-starting-PRB and PUCCH-2nd-hop-PRB, the UE does not perform frequency hopping, and therefore does not perform reference sequence hopping at the frequency hop level. Therefore, the UE uses one reference sequence within one slot.

When the UE is configured with different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB, the UE may apply the SF with intra-slot hopping, as shown in FIG. 12B. In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing.

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

In addition, when the UE is configured with different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB, the UE configures frequency hopping for at least one of PUCCH formats 0 to 4 in order to perform frequency hopping. Reference sequence hopping (switching reference sequences) in timing. In this case, the UE may apply the reference sequence #m ₀ before the frequency hopping timing and apply the reference sequence #m ₁ after the frequency hopping timing.

By varying the reference sequences within a slot, the probability that multiple UEs use different reference sequences increases, for example, before and/or after frequency hopping (reference sequence hopping). Therefore, the collision probability of the reference sequence is lowered, and the resistance to inter-cell interference is increased.

When the UE is configured with different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB, it may be assumed that PUCCH-frequency-hopping is not disabled (enabled). In addition, if PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other are set, the UE uses SF for with intra-slot hopping regardless of whether PUCCH-frequency-hopping is enabled or disabled. may be applied.

When PUCCH-frequency-hopping is set to disabled and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set to be equal to each other, the UE applies SF for no intra-slot hopping, and the UE -If frequency-hopping is enabled and different PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set, the UE may perform the operation of applying SF with intra-slot hopping. . If PUCCH-frequency-hopping is set to invalid and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB that are different from each other are set for the UE that performs the UE operation, even if the setting is assumed to be invalid. Yes (you may assume that combination is not set). If PUCCH-frequency-hopping is set to valid and PUCCH-starting-PRB and PUCCH-2nd-hop-PRB are set to be equal to each other, the UE that performs the UE operation may assume that the setting is invalid. Yes (you may assume that combination is not set).

According to the seventh aspect, the NW can flexibly change the SF using frequency hopping settings. Furthermore, the UE can appropriately control reference sequence hopping based on the frequency hopping settings.

Also, since it is preferable to use the same reference sequence within one time domain OCC, reference sequence hopping at the slot level or frequency hop level is applied. On the other hand, since changing the cyclic shift within one time domain OCC does not affect the orthogonality of the time domain OCC, hopping in units of symbols (symbol level) may be applied to the cyclic shift. , slot level hopping or frequency hop level cyclic shift hopping may be applied in the same way as the reference sequence.

(Eighth aspect)
In an eighth aspect, a method will be described in which the UE determines the SF for PUCCH format 1 when the UE is configured with PUCCH-frequency-hopping (or a parameter equivalent thereto).

The SF for PUCCH format 1 is associated with the PUCCH length, the SF for no intra-slot hopping and the SF for with intra-slot hopping are associated with the PUCCH length, and the SF for with intra-slot hopping is for the first hop. Assume that it includes an SF and a second hop SF (for example, FIG. 2). Further, it is assumed that a time domain OCC sequence is associated with the SF (for example, FIG. 3).

Note that the UE may use the SF with intra-slot hopping even if it does not actually perform intra-slot frequency hopping of the PUCCH.

The UE may determine the SF based on PUCCH-frequency-hopping among the configured PUCCH resources.

If PUCCH-frequency-hopping is disabled, the UE may apply SF for no intra-slot hopping, as shown in FIG. 13A.

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (OCC multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

When the UE is notified of PUCCH-frequency-hopping indicating invalidity through upper layer signaling, the UE may perform one of the following operations 1 and 2.

・Operation 1
The UE assumes that the value of PUCCH-starting-PRB notified by upper layer signaling and the value of PUCCH-2nd-hop-PRB notified by upper layer signaling are the same.

・Operation 2
The UE assumes that the PUCCH-starting-PRB is notified by upper layer signaling and ignores the value of PUCCH-2nd-hop-PRB or assumes that the value of PUCCH-2nd-hop-PRB is invalid. .

If PUCCH-frequency-hopping is enabled, the UE may apply SF with intra-slot hopping, as shown in FIG. 13B. In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing. Here, regarding the above frequency hopping timing, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ) may be ceil (number of PUCCH symbols/2).

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

When the UE is notified of PUCCH-frequency-hopping indicating validity by upper layer signaling, PUCCH-2nd-hop-PRB notified by upper layer signaling is changed to PUCCH-starting-PRB notified by upper layer signaling. SF for with intra-slot hopping may be applied to PUCCH regardless of whether it is equal to or not.

According to the eighth aspect, the NW (network, e.g., wireless base station, gNB) can flexibly change the SF (OCC length or OCC multiplexing capacity) using frequency hopping settings.

(Ninth aspect)
A ninth aspect describes a method for a UE to determine a DMRS configuration for PUCCH formats 3 and/or 4 when the UE is configured with PUCCH-frequency-hopping (or an equivalent parameter). . The DMRS configuration may be a DMRS location (eg, symbol).

Similar to SF, regarding the DMRS configuration for PUCCH formats 3 and/or 4, a DMRS configuration for no intra-slot hopping and a DMRS configuration for intra-slot hopping are provided. The configuration may be defined in the specification. The DMRS configuration with intra-slot hopping may include a first hop DMRS configuration and a second hop DMRS configuration.

The UE may determine the DMRS configuration based on PUCCH-frequency-hopping among the configured PUCCH resources.

If PUCCH-frequency-hopping is disabled, the UE may apply a DMRS configuration for no intra-slot hopping, as shown in FIG. 14A.

When the UE is notified of PUCCH-frequency-hopping indicating invalidity through upper layer signaling, the UE may perform one of the following operations 1 and 2.

・Operation 1
The UE assumes that the value of PUCCH-starting-PRB notified by upper layer signaling and the value of PUCCH-2nd-hop-PRB notified by upper layer signaling are the same.

・Operation 2
The UE assumes that the PUCCH-starting-PRB is notified by upper layer signaling and ignores the value of PUCCH-2nd-hop-PRB or assumes that the value of PUCCH-2nd-hop-PRB is invalid. .

If PUCCH-frequency-hopping is enabled, the UE may apply a DMRS configuration with intra-slot hopping, as shown in FIG. 14B. In this case, the UE may apply the first hop DMRS configuration before the frequency hopping timing, and may apply the second hop DMRS configuration after the frequency hopping timing. Here, regarding the above frequency hopping timing, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ) may be ceil (number of PUCCH symbols/2).

When the UE is notified of PUCCH-frequency-hopping indicating validity by upper layer signaling, PUCCH-2nd-hop-PRB notified by upper layer signaling is changed to PUCCH-starting-PRB notified by upper layer signaling. A DMRS configuration with intra-slot hopping may be applied regardless of whether it is equal to or not.

Note that the location of the DMRS when frequency hopping is not applied may be the same as the location of the DMRS when frequency hopping is applied.

According to the ninth aspect, the NW can flexibly change the DMRS configuration using frequency hopping settings.

(Tenth aspect)
In the tenth aspect, when the UE is configured with PUCCH-frequency-hopping (or a parameter equivalent to it), the UE selects A method of determining a reference sequence for at least one and/or SF for PUCCH format 1 is described. A reference sequence may be represented by a reference sequence index.

The reference series may be a CAZAC (Constant Amplitude Zero Auto-Correlation) series such as a Zadoff-Chu series (for example, a low PAPR (peak-to-average power ratio) series), or a specification It may be a sequence defined by (for example, a low PAPR sequence) or a pseudo-spreading sequence (for example, a Gold sequence). For example, PUCCH with a bandwidth of 1 PRB is based on one of a predetermined number of sequences (for example, 30, 60, or a predetermined value determined from the reference sequence length) specified by the specifications. It may also be used as a series. The reference sequence may be used for UCI or DMRS.

Similar to the eighth aspect, regarding the SF for PUCCH format 1, an SF for no intra-slot hopping and an SF for with intra-slot hopping may be set in advance or defined in the specifications.

The UE may determine the reference sequence and/or SF based on PUCCH-frequency-hopping among the configured PUCCH resources.

For reference sequence hopping, there are two methods: hopping the reference sequence in units of slots (slot level) and hopping the reference sequence at the timing of frequency hopping (in units of OCC length) (frequency hop level, time domain OCC level). Conceivable.

(Aspect 10-1)
Here, a case will be described in which slot-level reference sequence hopping is applied.

If PUCCH-frequency-hopping is disabled, the UE may apply SF for no intra-slot hopping, as shown in FIG. 15A.

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

When the UE is notified of PUCCH-frequency-hopping indicating invalidity through upper layer signaling, the UE may perform one of the following operations 1 and 2.

・Operation 1
The UE assumes that the value of PUCCH-starting-PRB notified by upper layer signaling and the value of PUCCH-2nd-hop-PRB notified by upper layer signaling are the same.

・Operation 2
The UE assumes that the PUCCH-starting-PRB is notified by upper layer signaling and ignores the value of PUCCH-2nd-hop-PRB or assumes that the value of PUCCH-2nd-hop-PRB is invalid. .

If PUCCH-frequency-hopping is enabled, the UE may apply SF with intra-slot hopping, as shown in FIG. 15B. In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing. Here, regarding the above frequency hopping timing, the number of symbols in the first hop (period before the frequency hopping timing in the slot) is floor (number of PUCCH symbols/2), and the number of symbols in the second hop (period after the frequency hopping timing in the slot) is ) may be ceil (number of PUCCH symbols/2).

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

Furthermore, the UE uses one reference sequence #m ₀ within one slot, regardless of whether PUCCH-frequency-hopping is enabled or disabled. In other words, the reference sequence does not change before and after the frequency hopping timing.

When the UE is notified of PUCCH-frequency-hopping indicating validity by upper layer signaling, PUCCH-2nd-hop-PRB notified by upper layer signaling is changed to PUCCH-starting-PRB notified by upper layer signaling. SF for with intra-slot hopping may be applied to PUCCH regardless of whether it is equal to or not.

According to this aspect, the NW can flexibly change the SF (OCC length) depending on whether PUCCH-frequency-hopping is enabled or disabled.

(Aspect 10-2)
Here, a case will be described in which frequency hop level reference sequence hopping is applied.

Note that even if the UE does not actually perform PUCCH frequency hopping, it may perform reference sequence hopping at the frequency hopping timing.

If PUCCH-frequency-hopping is disabled, the UE may apply SF for no intra-slot hopping, as shown in FIG. 16A.

The SF without intra-slot hopping is larger than the SF with intra-slot hopping (first hop SF and second hop SF, respectively). By using the SF without intra-slot hopping, the OCC length becomes longer (the number of OCCs increases) compared to the case where the SF with intra-slot hopping is used. Therefore, OCC multiplexing capacity (multiplexing capacity, maximum number of UEs to be multiplexed) can be increased.

When the UE is notified of PUCCH-frequency-hopping indicating invalidity through upper layer signaling, the UE may perform one of the following operations 1 and 2.

・Operation 1
The UE assumes that the value of PUCCH-starting-PRB notified by upper layer signaling and the value of PUCCH-2nd-hop-PRB notified by upper layer signaling are the same.

・Operation 2
The UE assumes that the PUCCH-starting-PRB is notified by upper layer signaling and ignores the value of PUCCH-2nd-hop-PRB or assumes that the value of PUCCH-2nd-hop-PRB is invalid. .

Further, when PUCCH-frequency-hopping is disabled, the UE does not perform frequency hopping, and therefore does not perform reference sequence hopping at the frequency hop level. Therefore, the UE uses one reference sequence #m ₀ within one slot.

If PUCCH-frequency-hopping is enabled, the UE may apply SF with intra-slot hopping, as shown in FIG. 16B. In this case, the UE may apply the first hop SF before the frequency hopping timing and apply the second hop SF after the frequency hopping timing.

The SF with intra-slot hopping (the first hop SF and the second hop SF, respectively) is smaller than the SF without intra-slot hopping. By using the SF with intra-slot hopping, the OCC length becomes shorter than when using the SF without intra-slot hopping. Therefore, when the UE moves at high speed, the fluctuation of the signal in the time domain OCC becomes smaller, and the orthogonality of the time domain OCC is less likely to collapse, thereby increasing the robustness against the high speed movement of the UE.

When the UE is notified of PUCCH-frequency-hopping indicating validity by upper layer signaling, PUCCH-2nd-hop-PRB notified by upper layer signaling is changed to PUCCH-starting-PRB notified by upper layer signaling. SF for with intra-slot hopping may be applied to PUCCH regardless of whether it is equal to or not.

Furthermore, when PUCCH-frequency-hopping is enabled, the UE performs reference sequence hopping (switches the reference sequence) for at least one of PUCCH formats 0 to 4 at the timing of frequency hopping in order to perform frequency hopping. . In this case, the UE may apply the reference sequence #m ₀ before the frequency hopping timing and apply the reference sequence #m ₁ after the frequency hopping timing.

By varying the reference sequences within a slot, the probability that multiple UEs use different reference sequences increases, for example, before and/or after frequency hopping (reference sequence hopping). Therefore, the collision probability of the reference sequence is lowered, and the resistance to inter-cell interference is increased.

When the UE is notified of PUCCH-frequency-hopping indicating validity by upper layer signaling, PUCCH-2nd-hop-PRB notified by upper layer signaling is changed to PUCCH-starting-PRB notified by upper layer signaling. SF for with intra-slot hopping may be applied to PUCCH regardless of whether it is equal to or not.

According to the tenth aspect, the NW can flexibly change the SF using frequency hopping settings. Furthermore, the UE can appropriately control reference sequence hopping based on the frequency hopping settings.

Also, since it is preferable to use the same reference sequence within one time domain OCC, reference sequence hopping at the slot level or frequency hop level is applied. On the other hand, since changing the cyclic shift within one time domain OCC does not affect the orthogonality of the time domain OCC, hopping in units of symbols (symbol level) may be applied to the cyclic shift. , slot level hopping or frequency hop level cyclic shift hopping may be applied in the same way as the reference sequence.

(wireless communication system)
The configuration of a wireless communication system according to an embodiment of the present invention will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present invention or a combination thereof.

FIG. 13 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention. The wireless communication system 1 applies carrier aggregation (CA) and/or dual connectivity (DC) that integrates multiple basic frequency blocks (component carriers) with the system bandwidth (for example, 20 MHz) of the LTE system as one unit. can do.

Note that the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G. (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.

The wireless communication system 1 includes a wireless base station 11 forming a macro cell C1 with relatively wide coverage, and a wireless base station 12 (12a-12c) located within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. , is equipped with. Further, user terminals 20 are arranged in the macro cell C1 and each small cell C2. The arrangement, number, etc. of each cell and user terminal 20 are not limited to what is shown in the figure.

The user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously by CA or DC. Further, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (eg, 5 or less CCs, 6 or more CCs).

Communication can be performed between the user terminal 20 and the radio base station 11 using a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth carrier (also called an existing carrier, legacy carrier, etc.). On the other hand, a carrier with a relatively high frequency band (for example, 3.5 GHz, 5 GHz, etc.) and a wide bandwidth may be used between the user terminal 20 and the radio base station 12, or a carrier with a wide bandwidth may be used between the user terminal 20 and the radio base station 12. The same carrier may be used between. Note that the configuration of the frequency band used by each wireless base station is not limited to this.

Between the wireless base station 11 and the wireless base station 12 (or between the two wireless base stations 12), there is a wired connection (for example, an optical fiber, an X2 interface, etc. compliant with CPRI (Common Public Radio Interface)) or a wireless connection. The configuration may be such that

The radio base station 11 and each radio base station 12 are each connected to an upper station device 30 and connected to the core network 40 via the upper station device 30. Note that the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), etc., but is not limited thereto. Further, each radio base station 12 may be connected to the upper station device 30 via the radio base station 11.

Note that the radio base station 11 is a radio base station with a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission/reception point, or the like. The radio base station 12 is a radio base station with local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and a transmitter/receiver. It may also be called a point. Hereinafter, when the radio base stations 11 and 12 are not distinguished, they will be collectively referred to as the radio base station 10.

Each user terminal 20 is a terminal compatible with various communication systems such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).

In the wireless communication system 1, Orthogonal Frequency Division Multiple Access (OFDMA) is applied to the downlink as a radio access method, and Single Carrier Frequency Division Multiple Access (SC-FDMA) is applied to the uplink. Frequency Division Multiple Access) and/or OFDMA are applied.

OFDMA is a multicarrier transmission method that divides a frequency band into a plurality of narrow frequency bands (subcarriers) and performs communication by mapping data to each subcarrier. SC-FDMA is a single carrier transmission method that reduces interference between terminals by dividing the system bandwidth into bands with one or continuous resource blocks for each terminal and allowing multiple terminals to use different bands. be. Note that the uplink and downlink wireless access methods are not limited to a combination of these methods, and other wireless access methods may be used.

In the wireless communication system 1, downlink channels include a downlink shared channel (PDSCH: Physical Downlink Shared Channel) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1/L2 control channel, etc. used. User data, upper layer control information, SIB (System Information Block), etc. are transmitted through the PDSCH. Furthermore, MIB (Master Information Block) is transmitted via the PBCH.

Downlink L1/L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like. Downlink control information (DCI) including scheduling information of PDSCH and/or PUSCH, etc. are transmitted by PDCCH.

Note that the scheduling information may be notified by the DCI. For example, a DCI that schedules DL data reception may be referred to as a DL assignment, and a DCI that schedules UL data transmission may be referred to as a UL grant.

The number of OFDM symbols used for PDCCH is transmitted by PCFICH. PHICH transmits delivery confirmation information (for example, also referred to as retransmission control information, HARQ-ACK, ACK/NACK, etc.) of HARQ (Hybrid Automatic Repeat reQuest) for PUSCH. EPDCCH is frequency division multiplexed with PDSCH (downlink shared data channel), and is used for transmission of DCI and the like like PDCCH.

In the wireless communication system 1, uplink channels include a physical uplink shared channel (PUSCH) shared by each user terminal 20, a physical uplink control channel (PUCCH), and a random access channel (PRACH). Physical Random Access Channel) etc. are used. User data, upper layer control information, etc. are transmitted through the PUSCH. Further, downlink radio quality information (CQI: Channel Quality Indicator), delivery confirmation information, scheduling request (SR: Scheduling Request), etc. are transmitted by PUCCH. A random access preamble for establishing a connection with a cell is transmitted by PRACH.

In the wireless communication system 1, downlink reference signals include a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DMRS). DeModulation Reference Signal), positioning reference signal (PRS), etc. are transmitted. Furthermore, in the wireless communication system 1, measurement reference signals (SRS), demodulation reference signals (DMRS), and the like are transmitted as uplink reference signals. Note that DMRS may be called a user terminal-specific reference signal (UE-specific reference signal). Further, the reference signals to be transmitted are not limited to these.

<Wireless base station>
FIG. 14 is a diagram showing an example of the overall configuration of a wireless base station according to an embodiment of the present invention. The radio base station 10 includes a plurality of transmitting/receiving antennas 101, an amplifier section 102, a transmitting/receiving section 103, a baseband signal processing section 104, a call processing section 105, and a transmission path interface 106. Note that each of the transmitting/receiving antenna 101, the amplifier section 102, and the transmitting/receiving section 103 may be configured to include one or more.

User data transmitted from the wireless base station 10 to the user terminal 20 via the downlink is input from the upper station device 30 to the baseband signal processing unit 104 via the transmission path interface 106.

The baseband signal processing unit 104 processes user data using PDCP (Packet Data Convergence Protocol) layer processing, user data division/combination, RLC layer transmission processing such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access Protocol) layer processing. Control) Transmission processing such as retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, and precoding processing is performed in the transmitting and receiving unit. 103. Further, the downlink control signal is also subjected to transmission processing such as channel encoding and inverse fast Fourier transform, and then transferred to the transmitting/receiving section 103.

The transmitter/receiver 103 converts the baseband signal outputted from the baseband signal processor 104 by precoding for each antenna into a radio frequency band and transmits the baseband signal. The radio frequency signal frequency-converted by the transmitting/receiving section 103 is amplified by the amplifier section 102 and transmitted from the transmitting/receiving antenna 101. The transmitting/receiving unit 103 can be configured from a transmitter/receiver, a transmitting/receiving circuit, or a transmitting/receiving device as described based on common recognition in the technical field related to the present invention. Note that the transmitting/receiving section 103 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section.

On the other hand, regarding uplink signals, a radio frequency signal received by the transmitting/receiving antenna 101 is amplified by the amplifier section 102. The transmitting/receiving section 103 receives the upstream signal amplified by the amplifier section 102. Transmission/reception section 103 frequency-converts the received signal into a baseband signal and outputs it to baseband signal processing section 104 .

The baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing, and error correction on user data included in the input uplink signal. Decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing are performed, and then transferred to the upper station device 30 via the transmission path interface 106. The call processing unit 105 performs communication channel call processing (setting, release, etc.), state management of the radio base station 10, radio resource management, and the like.

The transmission path interface 106 transmits and receives signals to and from the upper station device 30 via a predetermined interface. The transmission line interface 106 also transmits and receives signals (backhaul signaling) to and from other wireless base stations 10 via an inter-base station interface (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface). It's okay.

The transmitting/receiving unit 103 also transmits first frequency resource information (for example, PUCCH-starting-PRB) indicating the first frequency resource at the start of the uplink control channel (PUCCH) and the first frequency resource information after the frequency hopping timing of the uplink control channel. Second frequency resource information (for example, PUCCH-2nd-hop-PRB) indicating the second frequency resource may be transmitted to the user terminal 20. Further, the transmitting/receiving unit 103 may transmit frequency hopping information (PUCCH-frequency-hopping) indicating whether frequency hopping is effective or not to the user terminal 20.

FIG. 15 is a diagram showing an example of the functional configuration of a wireless base station according to an embodiment of the present invention. Note that this example mainly shows functional blocks that are characteristic of this embodiment, and it is assumed that the wireless base station 10 also has other functional blocks necessary for wireless communication.

The baseband signal processing section 104 includes at least a control section (scheduler) 301, a transmission signal generation section 302, a mapping section 303, a reception signal processing section 304, and a measurement section 305. Note that these configurations only need to be included in the radio base station 10, and some or all of the configurations do not need to be included in the baseband signal processing section 104.

A control unit (scheduler) 301 controls the entire radio base station 10. The control unit 301 can be configured from a controller, a control circuit, or a control device described based on common recognition in the technical field related to the present invention.

The control unit 301 controls, for example, signal generation by the transmission signal generation unit 302, signal allocation by the mapping unit 303, and the like. The control unit 301 also controls signal reception processing by the received signal processing unit 304, signal measurement by the measurement unit 305, and the like.

The control unit 301 performs scheduling (e.g., resources control). Further, the control unit 301 controls the generation of downlink control signals, downlink data signals, etc. based on the result of determining whether retransmission control is necessary for uplink data signals. The control unit 301 also controls scheduling of synchronization signals (eg, PSS (Primary Synchronization Signal)/SSS (Secondary Synchronization Signal)), downlink reference signals (eg, CRS, CSI-RS, DMRS), and the like.

The control unit 301 also controls uplink data signals (for example, signals transmitted on PUSCH), uplink control signals (for example, signals transmitted on PUCCH and/or PUSCH, delivery confirmation information, etc.), random access preambles (for example, control the scheduling of signals transmitted on the PRACH), uplink reference signals, etc.

Further, the control unit 301 may control reception of the uplink control channel (PUCCH) based on the first frequency resource information and the second frequency resource information. Further, the control unit 301 may control reception of the uplink control channel (PUCCH) based on the first frequency resource information, the second frequency resource information, and the frequency hopping information. Further, the control unit 301 may control reception of an uplink control channel (PUCCH) based on frequency hopping information.

Transmission signal generation section 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from control section 301, and outputs it to mapping section 303. The transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device as described based on common recognition in the technical field related to the present invention.

For example, based on an instruction from the control unit 301, the transmission signal generation unit 302 generates a DL assignment for reporting downlink data allocation information and/or a UL grant for reporting uplink data allocation information. Both DL assignments and UL grants are DCI and follow the DCI format. Further, the downlink data signal is subjected to encoding processing and modulation processing in accordance with the coding rate, modulation method, etc. determined based on channel state information (CSI: Channel State Information) from each user terminal 20 and the like.

Mapping section 303 maps the downlink signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301 and outputs the mapped signal to predetermined radio resources. The mapping unit 303 can be configured from a mapper, a mapping circuit, or a mapping device as described based on common recognition in the technical field related to the present invention.

Received signal processing section 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the received signal input from transmitting/receiving section 103 . Here, the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20. The received signal processing unit 304 can be configured from a signal processor, a signal processing circuit, or a signal processing device as described based on common recognition in the technical field related to the present invention.

Received signal processing section 304 outputs information decoded by reception processing to control section 301. For example, when receiving PUCCH including HARQ-ACK, HARQ-ACK is output to control section 301. Further, the received signal processing section 304 outputs the received signal and/or the signal after receiving processing to the measuring section 305.

The measurement unit 305 performs measurements on the received signal. The measuring unit 305 can be configured from a measuring instrument, a measuring circuit, or a measuring device described based on common recognition in the technical field related to the present invention.

For example, the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, etc. based on the received signal. The measurement unit 305 measures reception power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio)), and signal strength (for example, RSSI ( Received Signal Strength Indicator)), propagation path information (for example, CSI), etc. may be measured. The measurement results may be output to the control unit 301.

<User terminal>
FIG. 16 is a diagram illustrating an example of the overall configuration of a user terminal according to an embodiment of the present invention. The user terminal 20 includes a plurality of transmitting/receiving antennas 201, an amplifier section 202, a transmitting/receiving section 203, a baseband signal processing section 204, and an application section 205. Note that each of the transmitting/receiving antenna 201, the amplifier section 202, and the transmitting/receiving section 203 may be configured to include one or more.

A radio frequency signal received by the transmitting/receiving antenna 201 is amplified by the amplifier section 202. Transmission/reception section 203 receives the downlink signal amplified by amplifier section 202. Transmission/reception section 203 frequency-converts the received signal into a baseband signal and outputs it to baseband signal processing section 204 . The transmitting/receiving unit 203 can be configured from a transmitter/receiver, a transmitting/receiving circuit, or a transmitting/receiving device as described based on common recognition in the technical field related to the present invention. Note that the transmitting/receiving section 203 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section.

The baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, etc. on the input baseband signal. Downlink user data is transferred to the application section 205. The application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Furthermore, among the downlink data, broadcast information may also be transferred to the application unit 205.

On the other hand, uplink user data is input from the application section 205 to the baseband signal processing section 204. The baseband signal processing unit 204 performs transmission processing for retransmission control (for example, HARQ transmission processing), channel encoding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, etc. 203. The transmitter/receiver 203 converts the baseband signal output from the baseband signal processor 204 into a radio frequency band and transmits it. The radio frequency signal frequency-converted by the transmitting/receiving section 203 is amplified by the amplifier section 202 and transmitted from the transmitting/receiving antenna 201.

The transmitting/receiving unit 203 also transmits first frequency resource information (for example, PUCCH-starting-PRB) indicating the first frequency resource at the time of starting the uplink control channel, and the second frequency resource after the frequency hopping timing of the uplink control channel. 2nd frequency resource information (for example, PUCCH-2nd-hop-PRB) indicating the 2nd hop-PRB may be received. Further, the transmitting/receiving unit 203 may receive frequency hopping information (PUCCH-frequency-hopping) indicating whether frequency hopping is enabled.

FIG. 17 is a diagram illustrating an example of the functional configuration of a user terminal according to an embodiment of the present invention. Note that in this example, functional blocks that are characteristic of the present embodiment are mainly shown, and it is assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.

The baseband signal processing section 204 included in the user terminal 20 includes at least a control section 401, a transmission signal generation section 402, a mapping section 403, a received signal processing section 404, and a measurement section 405. Note that these configurations only need to be included in the user terminal 20, and some or all of the configurations do not need to be included in the baseband signal processing section 204.

The control unit 401 controls the entire user terminal 20. The control unit 401 can be configured from a controller, a control circuit, or a control device described based on common recognition in the technical field related to the present invention.

The control unit 401 controls, for example, signal generation by the transmission signal generation unit 402, signal allocation by the mapping unit 403, and the like. The control unit 401 also controls signal reception processing by the received signal processing unit 404, signal measurement by the measurement unit 405, and the like.

The control unit 401 acquires the downlink control signal and downlink data signal transmitted from the wireless base station 10 from the received signal processing unit 404. The control unit 401 controls the generation of uplink control signals and/or uplink data signals based on the result of determining whether retransmission control is necessary for downlink control signals and/or downlink data signals.

The control unit 401 also controls whether the second frequency resource indicated in the second frequency resource information (for example, PUCCH-2nd-hop-PRB) is indicated in the first frequency resource information (for example, PUCCH-starting-PRB) Transmission of the uplink control channel (PUCCH) may be controlled based on whether the frequency resource is equal to the first frequency resource.

The control unit 401 also determines whether the second frequency resource indicated in the second frequency resource information is equal to the first frequency resource indicated in the first frequency resource information, and determines whether the frequency hopping information (for example, PUCCH-frequency- hopping), a spreading factor of a time-domain orthogonal cover code applied to an uplink control channel, a configuration of a demodulation reference code included in the uplink control channel, a reference sequence applied to the uplink control channel, (first to third aspects).

Further, if the frequency hopping information indicates validity and the second frequency resource indicated in the second frequency resource information is different from the first frequency resource indicated in the first frequency resource information, the control unit 401 controls the frequency hopping. The reference sequence may be changed at the timing (aspect 3-2 in the third aspect).

The control unit 401 also determines whether frequency hopping is applied based on whether the second frequency resource indicated in the second frequency resource information is equal to the first frequency resource indicated in the first frequency resource information. It may be determined whether or not (fourth aspect).

The control unit 401 also controls the frequency resource applied to the uplink control channel based on whether the second frequency resource indicated in the second frequency resource information is equal to the first frequency resource indicated in the first frequency resource information. At least one of the spreading factor of the time-domain orthogonal cover code, the configuration of the demodulation reference code included in the uplink control channel, and the reference sequence applied to the uplink control channel may be determined (fifth to fifth Aspect 7).

Furthermore, the control unit 401 may apply at least one of the spreading factor of the time-domain orthogonal cover code, the configuration of the demodulation reference code, and the reference sequence to the uplink control channel based on the frequency hopping information. .

Also, for the time-domain orthogonal cover code applied to the uplink control channel, the first spreading factor for non-frequency hopping (e.g., SF for no intra-slot hopping) and the first spreading factor for frequency hopping 2 spreading factor (for example, SF for intra-slot hopping) is set in advance, and when the frequency hopping information indicates invalidity, the control unit 401 applies the first spreading factor to the uplink control channel. However, if the frequency hopping information indicates validity, the second spreading factor may be applied to the uplink control channel.

Also, for the time-domain orthogonal cover code applied to the uplink control channel, one spreading factor (e.g. SF for no intra-slot hopping) and two spreading factors (e.g. SF for no intra-slot hopping) are used. (first hop SF and second hop SF in the intra-slot hopping SF) are set in advance, and when the frequency hopping information indicates invalidity, the control unit 401 controls one spreading factor upstream. When applied to a channel and frequency hopping information indicates validity, two spreading factors may be applied before and after the timing of frequency hopping in an uplink control channel.

Furthermore, the control unit 401 may apply one reference sequence to the uplink control channel regardless of whether the frequency hopping information is valid or not.

Furthermore, when the frequency hopping information indicates validity, the control unit 401 may change the reference sequence applied to the uplink control channel at the timing of frequency hopping in the uplink control channel.

Further, for the demodulation reference code included in the uplink control channel, the first demodulation reference signal configuration and the second demodulation reference signal configuration are set in advance, and the control unit 401 determines whether the frequency hopping information is invalid. If the frequency hopping information indicates validity, the first demodulation reference signal configuration may be applied to the uplink control channel, and if the frequency hopping information indicates validity, the second demodulation reference signal configuration may be applied to the uplink control channel.

Transmission signal generation section 402 generates uplink signals (uplink control signal, uplink data signal, uplink reference signal, etc.) based on instructions from control section 401, and outputs them to mapping section 403. The transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device as described based on common recognition in the technical field related to the present invention.

Transmission signal generation section 402 generates uplink control signals regarding delivery confirmation information, channel state information (CSI), etc., based on instructions from control section 401, for example. Furthermore, the transmission signal generation section 402 generates an uplink data signal based on instructions from the control section 401. For example, the transmission signal generation section 402 is instructed by the control section 401 to generate an uplink data signal when the downlink control signal notified from the radio base station 10 includes a UL grant.

Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401 and outputs the mapped signal to radio resource. The mapping unit 403 can be configured from a mapper, a mapping circuit, or a mapping device as described based on common recognition in the technical field related to the present invention.

Received signal processing section 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the received signal input from transmitting/receiving section 203 . Here, the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10. The received signal processing unit 404 can be configured from a signal processor, a signal processing circuit, or a signal processing device as described based on common recognition in the technical field related to the present invention. Further, the received signal processing section 404 can constitute a receiving section according to the present invention.

Received signal processing section 404 outputs information decoded by reception processing to control section 401. The received signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, etc. to the control unit 401. Further, the received signal processing section 404 outputs the received signal and/or the signal after receiving processing to the measuring section 405.

The measurement unit 405 performs measurements on the received signal. The measuring unit 405 can be configured from a measuring instrument, a measuring circuit, or a measuring device described based on common recognition in the technical field related to the present invention.

For example, the measurement unit 405 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 405 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR), signal strength (eg, RSSI), propagation path information (eg, CSI), and the like. The measurement results may be output to the control unit 401.

<Hardware configuration>
It should be noted that the block diagram used to explain the above embodiment shows blocks in functional units. These functional blocks (components) are realized by any combination of hardware and/or software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically and/or logically coupled, or may be realized using two or more devices that are physically and/or logically separated. Alternatively, it may be realized using a plurality of devices connected indirectly (for example, using wires and/or wirelessly).

For example, the wireless base station, user terminal, etc. in one embodiment of the present invention may function as a computer that performs processing of the wireless communication method of the present invention. FIG. 18 is a diagram illustrating an example of the hardware configuration of a wireless base station and a user terminal according to an embodiment of the present invention. The wireless base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. good.

In addition, in the following description, the word "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the wireless base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processing may be performed by one processor, or the processing may be performed by one or more processors simultaneously, sequentially, or using other techniques. Note that the processor 1001 may be implemented using one or more chips.

Each function in the wireless base station 10 and the user terminal 20 is performed by the processor 1001 by loading a predetermined software (program) onto hardware such as the processor 1001 and the memory 1002, and the calculation is performed via the communication device 1004. This is achieved by controlling communication and controlling reading and/or writing of data in the memory 1002 and storage 1003.

The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the baseband signal processing section 104 (204), call processing section 105, etc. described above may be realized by the processor 1001.

Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from the storage 1003 and/or the communication device 1004 to the memory 1002, and executes various processes in accordance with these. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operated on the processor 1001, and other functional blocks may be similarly realized.

The memory 1002 is a computer-readable recording medium, and includes at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrical EPROM), RAM (Random Access Memory), and other suitable storage media. It may be composed of one. Memory 1002 may be called a register, cache, main memory, or the like. The memory 1002 can store executable programs (program codes), software modules, and the like to implement a wireless communication method according to an embodiment of the present invention.

The storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM), etc.), a digital versatile disk, removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. It may be configured by Storage 1003 may also be called an auxiliary storage device.

The communication device 1004 is hardware (transmission/reception device) for communicating between computers via a wired and/or wireless network, and is also referred to as, for example, a network device, network controller, network card, communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize frequency division duplex (FDD) and/or time division duplex (TDD). may be configured. For example, the above-described transmitting/receiving antenna 101 (201), amplifier section 102 (202), transmitting/receiving section 103 (203), transmission path interface 106, etc. may be realized by the communication device 1004.

The input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses for each device.

The wireless base station 10 and the user terminal 20 also include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.

(Modified example)
Note that terms explained in this specification and/or terms necessary for understanding this specification may be replaced with terms having the same or similar meanings. For example, a channel and/or a symbol may be a signal. Also, the signal may be a message. The reference signal can also be abbreviated as RS (Reference Signal), and may also be called a pilot, a pilot signal, etc. depending on the applied standard. Further, a component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, or the like.

Furthermore, a radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

Further, a slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. Furthermore, a slot may be a time unit based on numerology. Also, a slot may include multiple mini-slots. Each minislot may be made up of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot.

Radio frames, subframes, slots, minislots, and symbols all represent time units for transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol. For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, and one slot or minislot may be called a TTI. It's okay. In other words, the subframe and/or TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. There may be. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, a radio base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a time unit for transmitting channel-coded data packets (transport blocks), code blocks, and/or code words, or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, number of symbols) to which a transport block, code block, and/or codeword is actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, or the like. A TTI shorter than a normal TTI may be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, or the like.

Note that long TTI (for example, normal TTI, subframe, etc.) may be read as TTI with a time length exceeding 1 ms, and short TTI (for example, short TTI, etc.) It may also be read as a TTI having the above TTI length.

A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more continuous subcarriers (subcarriers) in the frequency domain. Additionally, an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI long. One TTI and one subframe may each be composed of one or more resource blocks. Note that one or more RBs include physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. May be called.

Further, a resource block may be configured by one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

Note that the structures of the radio frame, subframe, slot, minislot, symbol, etc. described above are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB, Configurations such as the number of subcarriers, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

Furthermore, the information, parameters, etc. described in this specification may be expressed using absolute values, relative values from a predetermined value, or other information using corresponding information. It may also be expressed as For example, radio resources may be indicated by a predetermined index.

The names used for parameters and the like in this specification are not limiting in any respect. For example, the various channels (Physical Uplink Control Channel (PUCCH), Physical Downlink Control Channel (PDCCH), etc.) and information elements can be identified by any suitable name, so that the various channels and information elements assigned to these various channels and information elements can be identified by any suitable name. A name is not a limiting name in any respect.

The information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of

Additionally, information, signals, etc. may be output from upper layers to lower layers and/or from lower layers to upper layers. Information, signals, etc. may be input and output via multiple network nodes.

Input/output information, signals, etc. may be stored in a specific location (eg, memory) or may be managed using a management table. Information, signals, etc. that are input and output can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

Notification of information is not limited to the aspects/embodiments described herein, and may be performed using other methods. For example, the notification of information may be physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.

Note that the physical layer signaling may also be referred to as L1/L2 (Layer 1/Layer 2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc. Further, RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like. Further, MAC signaling may be notified using, for example, a MAC control element (MAC CE (Control Element)).

Further, notification of prescribed information (for example, notification of "X") is not limited to explicit notification, but may be made implicitly (for example, by not notifying the prescribed information or by providing other information) (by notification).

The determination may be made by a value expressed by 1 bit (0 or 1), or by a boolean value expressed by true or false. , may be performed by numerical comparison (for example, comparison with a predetermined value).

Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.

Additionally, software, instructions, information, etc. may be sent and received via a transmission medium. For example, if the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to , or other remote sources, these wired and/or wireless technologies are included within the definition of transmission medium.

As used herein, the terms "system" and "network" are used interchangeably.

In this specification, "Base Station (BS)," "wireless base station," "eNB," "gNB," "cell," "sector," "cell group," "carrier," and "component The term "carrier" may be used interchangeably. A base station may also be referred to by terms such as fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, small cell, etc.

A base station can accommodate one or more (eg, three) cells (also called sectors). If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is divided into multiple subsystems (e.g., small indoor base stations (RRHs)). Communication services can also be provided by remote radio heads). The term "cell" or "sector" refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.

As used herein, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably. . A base station may also be referred to by terms such as fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, small cell, etc.

A mobile station is defined by a person skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client or some other suitable terminology.

Furthermore, the radio base station in this specification may be replaced with user terminal. For example, each aspect/embodiment of the present invention may be applied to a configuration in which communication between a wireless base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device). In this case, the user terminal 20 may have the functions that the wireless base station 10 described above has. Furthermore, words such as "up" and "down" may be read as "side." For example, an uplink channel may be read as a side channel.

Similarly, the user terminal in this specification may be replaced with a wireless base station. In this case, the wireless base station 10 may have the functions that the user terminal 20 described above has.

In this specification, operations performed by a base station may be performed by its upper node in some cases. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (e.g. It is clear that this can be carried out by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc. (though not limited to these) or a combination thereof.

Each aspect/embodiment described in this specification may be used alone, may be used in combination, or may be switched and used in accordance with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this specification may be changed as long as there is no contradiction. For example, the methods described herein present elements of the various steps in an exemplary order and are not limited to the particular order presented.

Each aspect/embodiment described herein is applicable to LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802 The present invention may be applied to systems that utilize .20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate wireless communication methods, and/or next-generation systems expanded based on these.

As used herein, the phrase "based on" does not mean "based solely on" unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

As used herein, any reference to elements using the designations "first," "second," etc. does not generally limit the amount or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in any way.

As used herein, the term "determining" may encompass a wide variety of actions. For example, "determining" can mean calculating, computing, processing, deriving, investigating, looking up (e.g., using a table, database, or another data set). (searching in a structure), ascertaining, etc. may be considered to be "judging (determining)". In addition, "judgment (decision)" includes receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), access ( may be considered to be "determining" such as accessing data in memory (eg, accessing data in memory). In addition, "judgment" is considered to mean "judging" resolving, selecting, choosing, establishing, comparing, etc. Good too. In other words, "judgment (decision)" may be considered to be "judgment (decision)" of some action.

As used herein, the terms "connected", "coupled", or any variations thereof refer to any connection or connection, direct or indirect, between two or more elements. Coupling can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access."

As used herein, when two elements are connected, using one or more wires, cables and/or printed electrical connections, and as some non-limiting and non-inclusive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave range and/or the optical (both visible and invisible) range.

As used herein, the term "A and B are different" may mean "A and B are different from each other." Terms such as "separate", "coupled", etc. may be similarly interpreted.

Where the terms "including", "comprising", and variations thereof are used in this specification or in the claims, these terms, like the term "comprising," are used to refer to inclusive terms. intended to be accurate. Furthermore, the term "or" as used in this specification or in the claims is not intended to be exclusive or.

Although the present invention has been described in detail above, it is clear to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the present invention as determined based on the claims. Therefore, the description herein is for illustrative purposes only and is not intended to be construed as limiting the invention.

Claims (5)

Frequency hopping information indicating whether frequency hopping of the physical uplink control channel (PUCCH) is enabled, a starting PRB that is the first physical resource block (PRB) in the first hop, and the first PRB in the second hop. a receiving unit that receives a PUCCH resource configuration including a certain second hop PRB;
a control unit that applies at least one of a spreading factor of a time domain orthogonal cover code, a configuration of a demodulation reference code, and a reference sequence to the PUCCH based on the frequency hopping information;
The control unit includes:
If the frequency hopping information indicates invalid, a time domain orthogonal cover code with a first spreading factor for non-frequency hopping is applied to the PUCCH, and if the frequency hopping information indicates valid, a second spreading factor for frequency hopping is applied to the PUCCH. applying a time-domain orthogonal cover code to the PUCCH;
In a case where the frequency hopping information indicates validity, even if the positions of the second hop PRB and the start PRB in the frequency direction are the same, different reference sequences may exist between the first hop and the second hop. A terminal characterized in that it uses for the PUCCH. A first demodulation reference signal configuration and a second demodulation reference signal configuration are set in advance for the demodulation reference code included in the PUCCH,
The control unit applies the first demodulation reference signal configuration to the PUCCH when the frequency hopping information indicates invalidity, and applies the second demodulation reference signal configuration to the PUCCH when the frequency hopping information indicates validity. The terminal according to claim 1, wherein the terminal is applied to PUCCH. Even if the positions of the second hop PRB and the start PRB in the frequency direction are the same, the control unit may set different lengths depending on whether the PUCCH resource configuration indicates that the frequency hopping is enabled. The terminal according to claim 1 or 2, wherein the time domain orthogonal cover code having a time domain orthogonal cover code is used for PUCCH format 1. Frequency hopping information indicating whether frequency hopping of the physical uplink control channel (PUCCH) is enabled, a starting PRB that is the first physical resource block (PRB) in the first hop, and the first PRB in the second hop. receiving a PUCCH resource configuration including a certain second hop PRB;
applying at least one of a spreading factor of a time-domain orthogonal cover code, a configuration of a demodulation reference code, and a reference sequence to the PUCCH based on the frequency hopping information;
If the frequency hopping information indicates invalid, a time domain orthogonal cover code with a first spreading factor for non-frequency hopping is applied to the PUCCH, and if the frequency hopping information indicates valid, a second spreading factor for frequency hopping is applied to the PUCCH. applying a time-domain orthogonal cover code to the PUCCH;
In a case where the frequency hopping information indicates validity, even if the positions of the second hop PRB and the start PRB in the frequency direction are the same, different reference sequences may exist between the first hop and the second hop. A wireless communication method for a terminal, characterized in that the PUCCH is used for the PUCCH. A system having a terminal and a base station,
The terminal is
Frequency hopping information indicating whether frequency hopping of the physical uplink control channel (PUCCH) is enabled, a starting PRB that is the first physical resource block (PRB) in the first hop, and the first PRB in the second hop. a receiving unit that receives a PUCCH resource configuration including a certain second hop PRB;
a control unit that applies at least one of a spreading factor of a time domain orthogonal cover code, a configuration of a demodulation reference code, and a reference sequence to the PUCCH based on the frequency hopping information;
The control unit includes:
If the frequency hopping information indicates invalid, a time domain orthogonal cover code with a first spreading factor for non-frequency hopping is applied to the PUCCH, and if the frequency hopping information indicates valid, a second spreading factor for frequency hopping is applied to the PUCCH. applying a time-domain orthogonal cover code to the PUCCH;
Even if the frequency hopping information indicates validity and the positions of the second hop PRB and the start PRB are the same in the frequency direction, there is a difference between the first hop and the second hop. using a reference sequence for the PUCCH;
The system wherein the base station transmits the frequency hopping information and the PUCCH resource configuration.

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